We grab a Core i9 7900X processor and review the €289,- ASUS TUF X299 Mark 1 motherboard with it, yes the Sabertooth series is back. A nice looking motherboard in dark theme offering nice features, design and of course performance. This X299 motherboard can house Kaby-Lake-X and Skylake-X processors. Will the recent BIOS updates have fixed the initial Skylake-X issues?